import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home'
import Welcome from '../components/Welcome'
import Users from '../components/user/Users'
import Rights from '../components/power/Rights'
import Roles from '../components/power/Roles'
import Cate from '../components/goods/Cate'
import Params from "../components/goods/Params"
import GoodsList from "../components/goods/List"
import Add from "../components/goods/Add"
import Order from "../components/order/Order"
import Report from "../components/report/Report";

Vue.use(VueRouter)

const routes = [
  // 用户在访问 / 的时候自动跳转到登录页面
  { path: '/', redirect: '/login'},
  { path: '/login', component: Login },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [
      { path: '/welcome', component: Welcome },
      { path: '/users', component: Users },
      { path: '/rights', component: Rights },
      { path: '/roles', component: Roles },
      { path: '/categories', component: Cate },
      { path: '/params', component: Params },
      { path: '/goods', component: GoodsList },
      { path: '/goods/add', component: Add },
      { path: '/orders', component: Order },
      { path: '/reports', component: Report },
    ]
  }
]

const router = new VueRouter({
  routes
})

// 使用路由导航守卫控制访问权限
// 如果用户没有登录，但是直接通过URL访问特定页面，需要重新导航到登录页面
// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数，表示放行  next() 放行  next('/Login') 强制跳转
  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  // 如果tokenStr为空，则说明没有登录，就强制跳转到登录页
  if (!tokenStr) return next('/login')
  next()
})

export default router
